Two-dimensional(2D)materials showcase great potentials in both fundamental research and technology development,thanks to their unique chemical and physical properties that are usually not available in corresponding bu...Two-dimensional(2D)materials showcase great potentials in both fundamental research and technology development,thanks to their unique chemical and physical properties that are usually not available in corresponding bulk counterparts.As an emerging class of 2D materials,2D conductive metal-organic frameworks(2D c-MOFs)exhibit the characteristics of pre-designable and tunable structures,excellent crystallinity,intrinsic porosity and superior conductivity.During the past decade,2D c-MOFs have been rapidly developed in electronics,sensors,energy storage devices,etc.In this review,the electrical,magnetic and quantum properties of 2D c-MOFs are surveyed in detail.Their applications in semiconductor,metal,superconductor,topological insulator and porous magnet are highlighted.We envision that the combination of 2D c-MOFs with quantum materials could evoke rich physics,flexible chemistry and potential applications in both electronics and spintronics.展开更多
The integration of redox-active sites into the skeleton of open-framework materials is an efficient strategy toward high-performance organic electrodes for energy storage devices.In this work,stepwise introduction of ...The integration of redox-active sites into the skeleton of open-framework materials is an efficient strategy toward high-performance organic electrodes for energy storage devices.In this work,stepwise introduction of ketone(KT)groups to the skeletons of isostructural two-dimensional(2D)covalent organic frameworks(COFs)was realized by the condensation of 2,4,6-triformylphloroglucinol(Tp,as nodes)with a series of ditopic diamines,which contained none,one,two,and four KT moieties in each linker units,respectively.The precise control of the redox functionalities at the molecular level,combined with regular built-in channels in these KT-Tp COFs endowed them with superior capacitances and excellent rate capabilities for energy storage.In particular,2KT-Tp COF and 4KT-Tp COF electrodes exhibited high capacitances of 256 and 583 F g−1 at a discharge rate of 0.2 A g−1,respectively,which outperformed most reported COF-based electrodes.More importantly,exceptional long-term cyclabilities(>92%capacitance retention)were achieved even after 20,000 cycles at a high current density of 5 A g−1 for these KT-Tp COFs.Our results demonstrated that orthoquinone moieties rendered enhanced performance than the redox COFs with isolated carbonyl groups.展开更多
基金supported by the National Key Research and Development Program of China(2017YFA0207500)the National Natural Science Foundation of China(51973153)the Natural Science Foundation of Tianjin City(17JCJQJC44600)。
文摘Two-dimensional(2D)materials showcase great potentials in both fundamental research and technology development,thanks to their unique chemical and physical properties that are usually not available in corresponding bulk counterparts.As an emerging class of 2D materials,2D conductive metal-organic frameworks(2D c-MOFs)exhibit the characteristics of pre-designable and tunable structures,excellent crystallinity,intrinsic porosity and superior conductivity.During the past decade,2D c-MOFs have been rapidly developed in electronics,sensors,energy storage devices,etc.In this review,the electrical,magnetic and quantum properties of 2D c-MOFs are surveyed in detail.Their applications in semiconductor,metal,superconductor,topological insulator and porous magnet are highlighted.We envision that the combination of 2D c-MOFs with quantum materials could evoke rich physics,flexible chemistry and potential applications in both electronics and spintronics.
基金supported financially by the National Key Research and Development Program of China(2017YFA0207500)National Natural Science Foundation of China(51973153)+1 种基金and Natural Science Foundation of Tianjin City(17JCJQJC44600).C.Peng is grateful for the funding from the National Natural Science Foundation of China(21875141),Shanghai Pujiang Program(18PJ1409000)and the Opening Project of State Key Laboratory of Advanced Chemical Power Sources(SKLACPS-C-23).
文摘The integration of redox-active sites into the skeleton of open-framework materials is an efficient strategy toward high-performance organic electrodes for energy storage devices.In this work,stepwise introduction of ketone(KT)groups to the skeletons of isostructural two-dimensional(2D)covalent organic frameworks(COFs)was realized by the condensation of 2,4,6-triformylphloroglucinol(Tp,as nodes)with a series of ditopic diamines,which contained none,one,two,and four KT moieties in each linker units,respectively.The precise control of the redox functionalities at the molecular level,combined with regular built-in channels in these KT-Tp COFs endowed them with superior capacitances and excellent rate capabilities for energy storage.In particular,2KT-Tp COF and 4KT-Tp COF electrodes exhibited high capacitances of 256 and 583 F g−1 at a discharge rate of 0.2 A g−1,respectively,which outperformed most reported COF-based electrodes.More importantly,exceptional long-term cyclabilities(>92%capacitance retention)were achieved even after 20,000 cycles at a high current density of 5 A g−1 for these KT-Tp COFs.Our results demonstrated that orthoquinone moieties rendered enhanced performance than the redox COFs with isolated carbonyl groups.